|
1
21 package com.db4o.tools;
22
23 import com.db4o.*;
24 import com.db4o.ext.*;
25 import com.db4o.foundation.*;
26
27
34 public class Statistics {
35
36
41 public static void main(String  [] args) {
42 Db4o.configure().messageLevel(-1);
43 if (args == null || args.length != 1) {
44 System.out.println("Usage: java com.db4o.tools.Statistics <database filename>");
45 } else {
46 new Statistics().run(args[0]);
47 }
48 }
49
50 public void run(String filename) {
51 if (new java.io.File (filename).exists()) {
52 ObjectContainer con = null;
53 try {
54 con = Db4o.openFile(filename);
55 printHeader("STATISTICS");
56 System.out.println("File: " + filename);
57 printStats(con, filename);
58 con.close();
59 } catch (Exception e) {
60 System.out.println("Statistics failed for file: '" + filename + "'");
61 System.out.println(e.getMessage());
62 e.printStackTrace();
63 }
64 } else {
65 System.out.println("File not found: '" + filename + "'");
66 }
67 }
68
69 private void printStats(ObjectContainer con, String filename) {
70
71 Tree unavailable = new TreeString(REMOVE);
72 Tree noConstructor = new TreeString(REMOVE);
73
74 StoredClass[] internalClasses = con.ext().storedClasses();
76 for (int i = 0; i < internalClasses.length; i++) {
77 try {
78 Class clazz = Class.forName(internalClasses[i].getName());
79 try {
80 clazz.newInstance();
81 } catch (Throwable th) {
82 noConstructor =
83 noConstructor.add(new TreeString(internalClasses[i].getName()));
84 }
85 } catch (Throwable t) {
86 unavailable = unavailable.add(new TreeString(internalClasses[i].getName()));
87 }
88 }
89 unavailable = unavailable.removeLike(new TreeString(REMOVE));
90 noConstructor = noConstructor.removeLike(new TreeString(REMOVE));
91 if (unavailable != null) {
92 printHeader("UNAVAILABLE");
93 unavailable.traverse(new Visitor4() {
94 public void visit(Object obj) {
95 System.out.println(((TreeString) obj)._key);
96 }
97 });
98 }
99 if (noConstructor != null) {
100 printHeader("NO PUBLIC CONSTRUCTOR");
101 noConstructor.traverse(new Visitor4() {
102 public void visit(Object obj) {
103 System.out.println(((TreeString) obj)._key);
104 }
105 });
106 }
107
108 printHeader("CLASSES");
109 System.out.println("Number of objects per class:");
110
111 final Tree.ByRef ids = new Tree.ByRef(new TreeInt(0));
112
113 if (internalClasses.length > 0) {
114 Tree all = new TreeStringObject(internalClasses[0].getName(), internalClasses[0]);
115 for (int i = 1; i < internalClasses.length; i++) {
116 all =
117 all.add(
118 new TreeStringObject(internalClasses[i].getName(), internalClasses[i]));
119 }
120 all.traverse(new Visitor4() {
121 public void visit(Object obj) {
122 TreeStringObject node = (TreeStringObject) obj;
123 long[] newIDs = ((StoredClass)node._object).getIDs();
124 for (int j = 0; j < newIDs.length; j++) {
125 if (ids.value.find(new TreeInt((int) newIDs[j])) == null) {
126 ids.value = (TreeInt) ids.value.add(new TreeInt((int) newIDs[j]));
127 }
128 }
129 System.out.println(node._key + ": " + newIDs.length);
130 }
131 });
132
133 }
134
135 printHeader("SUMMARY");
136 System.out.println("File: " + filename);
137 System.out.println("Stored classes: " + internalClasses.length);
138 if (unavailable != null) {
139 System.out.println("Unavailable classes: " + unavailable.size());
140 }
141 if (noConstructor != null) {
142 System.out.println("Classes without public constructors: " + noConstructor.size());
143 }
144 System.out.println("Total number of objects: " + (ids.value.size() - 1));
145 }
146
147 private void printHeader(String str){
148 int stars = (39 - str.length()) / 2;
149 System.out.println("\n");
150 for (int i = 0; i < stars; i++) {
151 System.out.print("*");
152 }
153 System.out.print(" " + str + " ");
154 for (int i = 0; i < stars; i++) {
155 System.out.print("*");
156 }
157 System.out.println();
158 }
159
160 private static final String REMOVE = "XXxxREMOVExxXX";
161
162 }
163 |
Popular Tags |
Java API By Example, From Geeks To Geeks.